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template <typename T>
RecursiveGenerator<T>::Promise::Promise() noexcept
:
d_parentOrLeaf(this),
d_root(this)
{}
template <typename T>
inline auto RecursiveGenerator<T>::Promise::get_return_object() noexcept
{
return RecursiveGenerator<T>{ *this };
}
template <typename T>
inline void RecursiveGenerator<T>::Promise::unhandled_exception() noexcept
{
d_exception = std::current_exception();
}
template <typename T>
std::suspend_always RecursiveGenerator<T>::Promise::yield_value(T &value)
noexcept
{
d_value = std::addressof(value);
return {};
}
template <typename T>
std::suspend_always RecursiveGenerator<T>::Promise::yield_value(T &&value)
noexcept
{
d_value = std::addressof(value);
return {};
}
template <typename T>
inline auto
RecursiveGenerator<T>::Promise::yield_value(RecursiveGenerator &&generator)
noexcept
{
return yield_value(generator);
}
template <typename T>
auto RecursiveGenerator<T>::Promise::yield_value(
RecursiveGenerator &generator) noexcept
{
if (generator.d_promise != nullptr)
{
d_root->d_parentOrLeaf = generator.d_promise;
generator.d_promise->d_root = d_root;
generator.d_promise->d_parentOrLeaf = this;
generator.d_promise->resume();
if (!generator.d_promise->is_complete())
return Awaitable{ generator.d_promise };
d_root->d_parentOrLeaf = this;
}
return Awaitable{ 0 };
}
template <typename T>
inline void RecursiveGenerator<T>::Promise::destroy() noexcept
{
Handle::from_promise(*this).destroy();
}
template <typename T>
void RecursiveGenerator<T>::Promise::throw_if_exception()
{
if (d_exception != nullptr)
std::rethrow_exception(std::move(d_exception));
}
template <typename T>
inline bool RecursiveGenerator<T>::Promise::is_complete() noexcept
{
return Handle::from_promise(*this).done();
}
template <typename T>
inline T &RecursiveGenerator<T>::Promise::value() noexcept
{
return *(d_parentOrLeaf->d_value);
}
template <typename T>
void RecursiveGenerator<T>::Promise::pull() noexcept
{
d_parentOrLeaf->resume();
while (d_parentOrLeaf != this && d_parentOrLeaf->is_complete())
{
d_parentOrLeaf = d_parentOrLeaf->d_parentOrLeaf;
d_parentOrLeaf->resume();
}
}
template <typename T>
inline void RecursiveGenerator<T>::Promise::resume() noexcept
{
Handle::from_promise(*this).resume();
}
template <typename T>
inline RecursiveGenerator<T>::Promise::Awaitable::Awaitable(
Promise *childPromise)
:
d_childPromise(childPromise)
{}
template <typename T>
inline bool RecursiveGenerator<T>::Promise::Awaitable::await_ready() noexcept
{
return this->d_childPromise == 0;
}
template <typename T>
inline void RecursiveGenerator<T>::Promise::Awaitable::await_suspend(Handle)
noexcept
{}
template <typename T>
inline void RecursiveGenerator<T>::Promise::Awaitable::await_resume()
{
if (this->d_childPromise != 0)
this->d_childPromise->throw_if_exception();
}
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